Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service San Juan PR
121 AM AST Sun Aug 16 2026
PRZ001>005-007-008-010>013-VIZ001-002-162100-
/O.NEW.TJSJ.HT.Y.0036.260816T1400Z-260816T2100Z/
San Juan and Vicinity-Northeast-Southeast-Eastern Interior-North
Central-Ponce and Vicinity-Northwest-Mayaguez and Vicinity-
Southwest-Culebra-Vieques-St.Thomas...St. John...and Adjacent
Islands-St Croix-
Including the cities of Carolina, Ceiba, Mayaguez, Las Piedras,
Lajas, Loiza, Rio Grande, Charlotte Amalie East, Guanica,
Charlotte Amalie West, Anna`s Retreat, Juncos, Penuelas, Santa
Isabel, Ponce, Manati, Toa Alta, Aguadilla, Trujillo Alto, Yauco,
Florida, Patillas, Comerio, Rincon, Cruz Bay, Charlotte Amalie,
Frederiksted Southeast, Anasco, Quebradillas, San German,
Christiansted, Guaynabo, Arecibo, Guayama, Aguas Buenas, Canovanas,
Vega Baja, Camuy, Frederiksted, Hatillo, Arroyo, Juana Diaz, Maunabo,
Salinas, Naguabo, Caguas, Cayey, Cabo Rojo, Yabucoa, Humacao,
Fajardo, Isabela, San Juan, Luquillo, Culebra, Guayanilla, Cidra,
Dorado, Toa Baja, Gurabo, San Lorenzo, Catano, Barceloneta, Aguada,
Hormigueros, Vega Alta, Moca, Vieques, Bayamon, and Grove Place
121 AM AST Sun Aug 16 2026
...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 5 PM AST THIS
AFTERNOON...
* WHAT...This level of heat affects most individuals sensitive to
heat, especially those without effective cooling and/or adequate
hydration. expected.
* WHERE...Portions of Puerto Rico, Vieques, Culebra, and the U.S.
Virgin Islands.
* WHEN...From 10 AM this morning to 5 PM AST this afternoon.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
GRS
Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Juan PR
355 AM AST Sun Aug 16 2026
AMZ711-733-735-741-161600-
/O.CON.TJSJ.SC.Y.0023.000000T0000Z-260817T0400Z/
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
Caribbean waters of Puerto Rico from 10 NM to 17N, including the
coastal waters of Saint Croix-
Coastal Waters of Southern Puerto Rico out 10 NM-
Mona Passage Southward to 17N-
355 AM AST Sun Aug 16 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST
TONIGHT...
* WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas
5 to 8 ft.
* WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to
19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N,
including the coastal waters of Saint Croix, Coastal Waters of
Southern Puerto Rico out 10 NM and Mona Passage Southward to
17N.
* WHEN...Until midnight AST tonight.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Juan PR
355 AM AST Sun Aug 16 2026
AMZ712-716-723-726-161600-
/O.CON.TJSJ.SC.Y.0023.000000T0000Z-260816T1600Z/
Coastal Waters of Northern Puerto Rico out 10 NM-
Coastal Waters from Cabo San Juan to the waters between Anegada
Island and Virgin Gorda and North 10 NM-
Anegada Passage east of Virgin Gorda and Saint Croix south to 17N-
Coastal waters east of Puerto Rico, around Vieques, and around
and just north of Culebra and Saint John-
355 AM AST Sun Aug 16 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON AST TODAY...
* WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas
5 to 8 ft.
* WHERE...Coastal Waters of Northern Puerto Rico out 10 NM,
Coastal Waters from Cabo San Juan to the waters between
Anegada Island and Virgin Gorda and North 10 NM, Anegada
Passage east of Virgin Gorda and Saint Croix south to 17N and
Coastal waters east of Puerto Rico, around Vieques, and around
and just north of Culebra and Saint John.
* WHEN...Until noon AST today.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Rip Current Statement
Coastal Hazard Message
National Weather Service San Juan PR
354 AM AST Sun Aug 16 2026
PRZ001>003-005-007-008-011>013-VIZ001-002-161600-
/O.CON.TJSJ.RP.S.0019.000000T0000Z-260817T1000Z/
San Juan and Vicinity-Northeast-Southeast-North Central-
Ponce and Vicinity-Northwest-Southwest-Culebra-Vieques-
St.Thomas...St. John...and Adjacent Islands-St Croix-
354 AM AST Sun Aug 16 2026
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TONIGHT...
* WHAT...Life-threatening rip currents.
* WHERE...Exposed beaches of northern, eastern, and southern
Puerto Rico, Vieques, Culebra, and the U.S. Virgin Islands.
* WHEN...Through late tonight.
* IMPACTS...Rip currents can sweep even the best swimmers away
from shore into deeper water, where it becomes difficult to
return to safety.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
There is a high risk of rip currents.
Rip currents are powerful channels of water flowing quickly away
from shore, which occur most often at low spots or breaks in the
sandbar and in the vicinity of structures such as groins, jetties
and piers. Heed the advice of lifeguards, beach patrol flags and
signs.
If you become caught in a rip current, yell for help. Remain
calm, do not exhaust yourself and stay afloat while waiting for
help. If you have to swim out of a rip current, swim parallel to
shore and back toward the beach when possible. Do not attempt to
swim directly against a rip current as you will tire quickly.
&&
$$
